Thanks for your speedy reply. Not sure I understand your suggestion, could you give a newcomer a little more detail please. I am using XP SP3, I installed the standard "HP laserjet 1100 MS" driver offered by windows printer installer. Installed OK but when I try to print, the printer doesn't respond. I tried downloading "HP laserjet 1100" driver from HP site but still doesn't respond. (By "not rrespond" I mean that the driver seems to send the first tranche of data to the printer then fails because the printer doesn't react. The printer meanwhile is sitting with the green light on and never flashes the yellow light which it does when I use the printer with the old computer which has normal centronics 25way socket).